/**
 *    Copyright ${license.git.copyrightYears} the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.javamapper;

import static org.mybatis.generator.internal.util.messages.Messages.getString;

import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.CommentGenerator;
import org.mybatis.generator.api.dom.java.CompilationUnit;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.codegen.AbstractJavaGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.AbstractJavaProviderMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderApplyWhereMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderCountByExampleMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderDeleteByExampleMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderInsertSelectiveMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderSelectByExampleWithBLOBsMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderSelectByExampleWithoutBLOBsMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderUpdateByExampleSelectiveMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderUpdateByExampleWithBLOBsMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderUpdateByExampleWithoutBLOBsMethodGenerator;
import org.mybatis.generator.codegen.mybatis3.javamapper.elements.sqlprovider.ProviderUpdateByPrimaryKeySelectiveMethodGenerator;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class SqlProviderGenerator extends AbstractJavaGenerator {

  private boolean useLegacyBuilder;

  public SqlProviderGenerator(boolean useLegacyBuilder) {
    super();
    this.useLegacyBuilder = useLegacyBuilder;
  }

  @Override
  public List<CompilationUnit> getCompilationUnits() {
    progressCallback.startTask(getString("Progress.18", //$NON-NLS-1$
        introspectedTable.getFullyQualifiedTable().toString()));
    CommentGenerator commentGenerator = context.getCommentGenerator();

    FullyQualifiedJavaType type = new FullyQualifiedJavaType(introspectedTable.getMyBatis3SqlProviderType());
    TopLevelClass topLevelClass = new TopLevelClass(type);
    topLevelClass.setVisibility(JavaVisibility.PUBLIC);
    commentGenerator.addJavaFileComment(topLevelClass);

    boolean addApplyWhereMethod = false;
    addApplyWhereMethod |= addCountByExampleMethod(topLevelClass);
    addApplyWhereMethod |= addDeleteByExampleMethod(topLevelClass);
    addInsertSelectiveMethod(topLevelClass);
    addApplyWhereMethod |= addSelectByExampleWithBLOBsMethod(topLevelClass);
    addApplyWhereMethod |= addSelectByExampleWithoutBLOBsMethod(topLevelClass);
    addApplyWhereMethod |= addUpdateByExampleSelectiveMethod(topLevelClass);
    addApplyWhereMethod |= addUpdateByExampleWithBLOBsMethod(topLevelClass);
    addApplyWhereMethod |= addUpdateByExampleWithoutBLOBsMethod(topLevelClass);
    addUpdateByPrimaryKeySelectiveMethod(topLevelClass);

    if (addApplyWhereMethod) {
      addApplyWhereMethod(topLevelClass);
    }

    List<CompilationUnit> answer = new ArrayList<CompilationUnit>();

    if (topLevelClass.getMethods().size() > 0
        && context.getPlugins().providerGenerated(topLevelClass, introspectedTable)) {
      answer.add(topLevelClass);
    }

    return answer;
  }

  protected boolean addCountByExampleMethod(TopLevelClass topLevelClass) {
    boolean rc = false;
    if (introspectedTable.getRules().generateCountByExample()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderCountByExampleMethodGenerator(useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
      rc = true;
    }

    return rc;
  }

  protected boolean addDeleteByExampleMethod(TopLevelClass topLevelClass) {
    boolean rc = false;
    if (introspectedTable.getRules().generateDeleteByExample()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderDeleteByExampleMethodGenerator(useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
      rc = true;
    }

    return rc;
  }

  protected void addInsertSelectiveMethod(TopLevelClass topLevelClass) {
    if (introspectedTable.getRules().generateInsertSelective()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderInsertSelectiveMethodGenerator(useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
    }
  }

  protected boolean addSelectByExampleWithBLOBsMethod(TopLevelClass topLevelClass) {
    boolean rc = false;
    if (introspectedTable.getRules().generateSelectByExampleWithBLOBs()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderSelectByExampleWithBLOBsMethodGenerator(
          useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
      rc = true;
    }

    return rc;
  }

  protected boolean addSelectByExampleWithoutBLOBsMethod(TopLevelClass topLevelClass) {
    boolean rc = false;
    if (introspectedTable.getRules().generateSelectByExampleWithoutBLOBs()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderSelectByExampleWithoutBLOBsMethodGenerator(
          useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
      rc = true;
    }

    return rc;
  }

  protected boolean addUpdateByExampleSelectiveMethod(TopLevelClass topLevelClass) {
    boolean rc = false;
    if (introspectedTable.getRules().generateUpdateByExampleSelective()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderUpdateByExampleSelectiveMethodGenerator(
          useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
      rc = true;
    }

    return rc;
  }

  protected boolean addUpdateByExampleWithBLOBsMethod(TopLevelClass topLevelClass) {
    boolean rc = false;
    if (introspectedTable.getRules().generateUpdateByExampleWithBLOBs()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderUpdateByExampleWithBLOBsMethodGenerator(
          useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
      rc = true;
    }

    return rc;
  }

  protected boolean addUpdateByExampleWithoutBLOBsMethod(TopLevelClass topLevelClass) {
    boolean rc = false;
    if (introspectedTable.getRules().generateUpdateByExampleWithoutBLOBs()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderUpdateByExampleWithoutBLOBsMethodGenerator(
          useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
      rc = true;
    }

    return rc;
  }

  protected void addUpdateByPrimaryKeySelectiveMethod(TopLevelClass topLevelClass) {
    if (introspectedTable.getRules().generateUpdateByPrimaryKeySelective()) {
      AbstractJavaProviderMethodGenerator methodGenerator = new ProviderUpdateByPrimaryKeySelectiveMethodGenerator(
          useLegacyBuilder);
      initializeAndExecuteGenerator(methodGenerator, topLevelClass);
    }
  }

  protected void addApplyWhereMethod(TopLevelClass topLevelClass) {
    AbstractJavaProviderMethodGenerator methodGenerator = new ProviderApplyWhereMethodGenerator(useLegacyBuilder);
    initializeAndExecuteGenerator(methodGenerator, topLevelClass);
  }

  protected void initializeAndExecuteGenerator(AbstractJavaProviderMethodGenerator methodGenerator,
      TopLevelClass topLevelClass) {
    methodGenerator.setContext(context);
    methodGenerator.setIntrospectedTable(introspectedTable);
    methodGenerator.setProgressCallback(progressCallback);
    methodGenerator.setWarnings(warnings);
    methodGenerator.addClassElements(topLevelClass);
  }
}
